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Add note about weird "SPI" mode for ST7789V

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We're not in Kansas anymore here…
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Wladimir J. van der Laan 2020-11-06 06:08:22 +01:00
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doc/onboard.md
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@ -35,7 +35,7 @@ Maix Go
(source: schematic)
- ST7789V - 240x320 262K Color Single-Chip TFT Controller/Driver with Frame Memory (SPI)
- ST7789V - 240x320 262K Color Single-Chip TFT Controller/Driver with Frame Memory (SPI). Somewhat curiously the display is wired into 8-bit parallel mode (`IM3=IM2=IM1=IM0=0`, described in the datasheet as "8080-I Series MCU Parallel Interface"), and a special mode of the SPI peripheral called "OCTAL SPI" is used to interface with it. I don't think calling this SPI is entirely accurate.
- NS2009 - 4-Wire Touch Screen Controller (I2C, address 0x48\*)
- TF card slot (SPI)